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Self-expanding metallic esophageal stents:A long way to go before a particular stent can be recommended

World Journal of Gastroenterology 2011年第48期17卷 5327-5328页

作者： Pankaj Jain Department of Gastroenterology Fortis Modi Hospital Vivekan and Nagar324010 Kota Rajasthan India

We agree that the covered self-expanding metal stents (SEMSs) fare better than the uncovered stents as recurrent dysphagia due to tumor ingrowth is common with uncovered stent. Recent American College of Gastroenterology Practice Guideline on the Role of esophageal stents in Benign and Malignant Diseases concludes that SEMSs cannot be routinely recommended in conjunction with chemo-radiation. The comparison of ultraflex and choostent in the Italian study found no difference in the palliation of dysphagia, rate of complications and survival rate.

关键词： Self-expanding metallic esophageal stents Dysphagia esophageal stents

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The Placement of esophageal stents in Different esophageal Disease Related Conditions—A Review

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Open Journal of Gastroenterology 2016年第4期6卷 117-126页

作者： Qian Yu Sachin Mulmi Yang Liu Department of Gastroenterology Zhongda Hospital Affiliated to South East University Nanjing China

In the past, the esophagus diseases causing the patient to unable to intake oral diet such as esophageal strictures, leaks, tracheoesophageal fistulas, etc. were managed by surgical interventions and parenteral nutrition to meet the demand of the body. After the development of technique of stent placement in esopahgus, there was revolutionary change in the management of such conditions promoting patients to take diet orally and improve their nutritional status as well as quality of life. Different types of commercial stents are available in the market with their own pros and cons. Our aim of this study was to review the different stents being used currently in the clinical practice, comparing the stents on their therapeutic outcome and complications, optimal timing of removal of stents for benign conditions and the methods studied by different clinicians to lower the rate of complications and reinterventions.

关键词： esophageal stents esophageal Strictures Dysphagia Stent Migration Self Expandable Metal stents

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In vitro Degradation of Pure Mg for esophageal Stent in Artificial Saliva

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Journal of Materials Science & Technology 2016年第5期32卷 437-444页

作者： Rong-Chang Zeng Xiao-Ting Li Li-Jun Liu Shuo-Qi Li Fen Zhang College of Materials Science and Engineering Shandong University of Science and Technology State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology Shandong University of Science and Technology

Magnesium and its alloys as biodegradable implant materials can be potentially used in cardiovascular and orthopedic devices. However, few studies have focused on its application in esophageal stents. In this paper, time-lapse degradation characteristics of pure Mg were analyzed by scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction, Fourier transform infrared spectroscopy, hydrogen evolution, pH and electrochemical measurements after immersion in artificial saliva for different times. Results revealed that a dense degradation product film formed on samples, which mainly consisted of two kinds of layers： one was calcium phosphate compounds with different structures; the other was thin magnesium hydrate layer close to the substrate. Less pH increase and low degradation rate were ob- served in the first 5 days of immersion, which can be ascribed to the formation of a thicker and denser layer on the sample surface with increasing immersion time. And then there was an increase in degradation rate and pH values; the deposition layer remained almost intact after immersion for 6 and 8 days. After 10 days of immersion, the degradation rate and pH value remained stable, and the calcium phosphate layer was delaminated and the inner magnesium hydrate layer was exposed. This study indicated that pure Mg exhibited desirable degradation resistance in artificial saliva, which provided magnesiumbased materials with the potential to be used as esophageal stents.

关键词： Magnesium Biomaterials esophageal stents Degradation Artificial saliva

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